/Engine/Source/Runtime/Experimental/Iris/Core/Public/Iris/Serialization/NetSerializerBuilder.inl
Provide a default SerializeDelta implementation if needed. The default will compare the value with previous value and write an extra bit and forward to Serialize if the value differs It is possible to opt out by adding static constexpr bool bUseDefaultDelta = false; in the serializer declaration
template<typename T, typename U, bool V> static [NetSerializeDeltaFunction](API\Runtime\IrisCore\Iris\Serialization\NetSerializeDeltaFunction) GetSerializeDeltaFunction()